Pegmatites Return Highly Anomalous Lithium at Robinson Bore Yinnetharra Lockier Range Project, Gascoyne

Odessa Minerals Limited (ASX:ODE) (“Odessa” or the “Company”) is pleased to provide a further update on the exploration program underway at its Yinnetharra Lithium Project at Lockier Range in the Gascoyne region of Western Australia.

Highlights:

• First assay results confirm fertility of Robinson Bore pegmatites to host lithium-bearing minerals
• >16,500m of pegmatites mapped at Robinson Bore
• First rock chip assays of pegmatites at Robinson Bore return up to:
  • 1097ppm Li2O
  • 10 other samples above 500ppm Li2O
• Highly-elevated key lithium-pegmatite pathfinders including:
  • > 2000ppm Rb in four pegmatites
  • 672ppm Cs
  • 212ppm Ta
  • 2970ppm Be
• Soil sampling complete - assay results pending
• Sampling in other pegmatite fields including Central Pegmatite Field, pending assay

The Robinson Bore pegmatite field is one of four mapped pegmatite fields at the Lockier Range Project, located proximal to Delta Lithium’s Yinnetharra lithium discovery. Robinson Bore contains >16,500 metres of mapped pegmatites (Figure 1). Recent rock sampling results from pegmatites have demonstrated their fertility to host lithium-bearing minerals. Previous soil sampling results have shown extensive lithium anomalies over 4 x 2km.

Recent rock chip sampling aimed to identify highly fractionated and fertile pegmatites within the Robinson Bore pegmatite field through feldspar and mica multi-element analysis, as well as whole-rock pegmatite analysis. The Company has successfully identified a 2.5km-long northwest-trending corridor of fractionated pegmatites coincident with a lithium-in-soil anomaly (Figure 2). Peak Li2O in rock was 1097 ppm. A further 10 samples returned anomalous Li2O values above 500pm, with coincident elevated pathfinders of Cs-Ta-Be (Figure 3).

David Lenigas, Executive Director of Odessa, said: “Highly promising first assay results are in from our extensive rock chip and soil sampling programme at our Yinnetharra Lockier Range Project. The K/Rb ratios from some of our samples are showing that we are in or near to the sweet spot for lithium mineralisation and we are already seeing some strong lithium indicators coming through. The majority of more than 16km of mapped pegmatites at Robinson Bore sub-crop, with vast areas concealed by cover material. The Company is awaiting the assay results from a 100m x 100m infill soil sampling programme to identify the extent of the potential blind, fertile pegmatites. The soil sample results will be of particular importance at the northern end of the fractionation trend, where the most fractionated pegmatites have been discovered, but rarely outcrop.”

Figure 1: Principal pegmatite target areas within the Lockier Range Project showing the extent of mapped pegmatites underlain by gridded soil results coded by Li2O ppm (refer company announcements dated 14 July 2023 & 21st August 2023).

Figure 2: Rock chips from pegmatites coded by K/Rb elemental ratios underlain by gridded soil results coded by Li2O ppm (refer company announcements dated 14 July 2023 & 21st August 2023). Pegmatite targets highlighted.

Figure 3: All rock chip samples across the Robinson Bore Prospect coded by Li2O ppm underlain by gridded soil results coded by Li2O ppm (refer company announcements dated 14 July 2023 & 21st August 2023). Pegmatite targets highlighted.

Lockier Range Project Location

Odessa’s Lockier Range Lithium and Rare Earth Element (“REE”) Project covers a large area of 125km2 within its substantial Gascoyne tenement package of +3,000 km2; and is ideally located:

• Adjoining Minerals 260’s “Aston” Lithium project with extensive anomalies
• ~8.5km southwest of Delta Lithium’s “Jameson” lithium pegmatite discovery
• ~15km west of Reach Resources’ “Morrissey Hill” lithium pegmatite discovery
• ~25km west of Delta Lithium’s “Yinnetharra” lithium pegmatite discovery
• ~40km west of Voltaic Strategic Resources’ pegmatite discovery
• ~60-70km south of Hastings Technologies’ and Dreadnought Resources’ rare earth projects

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